Anthidiellum (Pycnanthidium) cornu Tran, Engel & Nguyen, sp. nov., holotype, male A lateral habitus B dorsal habitus C facial view D mesosoma in dorsal view E oblique dorsal view of metasoma F metasomal apex, red arrow indicating stiff peg-like and scale-like setae on apical margin of metasomal S5 G metapretarsus, red arrow indicating arolium. Scale bars: 1 mm (A, B, F); 0.5 mm (C–E, G).

 
 
  Part of: Tran NT, Engel MS, Nguyen CQ, Tran DD, Nguyen LTP (2023) The bee genus Anthidiellum in Vietnam: descriptions of five new species and the first male of Anthidiellum coronum (Hymenoptera, Megachilidae). ZooKeys 1144: 171-196. https://doi.org/10.3897/zookeys.1144.98644